K. S. Tan
IGCSE Chemistry Teacher
15+ years teaching IGCSE Chemistry
Supports Cambridge IGCSE Chemistry 0620, including topic knowledge, calculations, multiple choice, structured theory and practical skills.
Chemistry Proof · Published Only When It Is Genuine
Teacher Experience, Student Progress and Final Results Are Different Claims
This page does not borrow Math results, invent Chemistry A* stories or turn teacher experience into a guaranteed student outcome. It shows what can be verified now — including genuine student and parent testimonials — what useful progress evidence should look like, and what must exist before a specific Chemistry grade result is published.
Verified Today
The Chemistry Experience Facts Currently Published
Ms Yash
IGCSE Chemistry Teacher
10+ years teaching IGCSE Chemistry
Supports Cambridge IGCSE Chemistry 0620, including topic knowledge, calculations, multiple choice, structured theory and practical skills.
Ms Kartini
IGCSE Chemistry Teacher
15+ years teaching IGCSE Chemistry
Supports Cambridge IGCSE Chemistry 0620, including topic knowledge, calculations, multiple choice, structured theory and practical skills.
The site does not attach an unverified degree, examiner role, school appointment or grade record to any of the teachers. Those details should be added only after separate verification.
Genuine Feedback
What Chemistry Students and Parents Say
Genuine, permissioned feedback from students and parents working with the Chemistry team. These are qualitative testimonials, kept separate from verified grade results.
Ms Kartini is currently my Chemistry tutor. She's very nice and is able to help me work on specific areas that I needed practice on, allowing me to better understand them and strengthening the weak areas. She prepares slides, notes and worksheets beforehand and explains the topics very concisely.
Mr Tan is an exceptional teacher. Even though he's very serious, his teaching is very effective. I can see that my son is becoming more confident with Chemistry and doing much better now.
Published with permission. Reviewer names are withheld for privacy in line with our editorial policy.
What Is Not Currently Claimed
No fabricated Chemistry grades
No student is presented as moving from one Chemistry grade to another without a real, permissioned record belonging to this service.
No borrowed Math proof
The founder's Math teaching background remains labelled as Math and is not used as a Chemistry result or Chemistry teaching credential.
No guaranteed target grade
A grade depends on the student's route, starting point, time, attendance, independent practice, school programme and examination performance.
Service-Wide Record
What LearnWithRig Tutoring Has Recorded So Far
These figures describe LearnWithRig tutoring as a whole — across the subjects and years we have taught — and are shown here with their exact conditions. They are not a Chemistry-only statistic and not a prediction for any individual student. Chemistry-specific results will be published on this page only when a genuine, permissioned record exists.
Across LearnWithRig tutoring
- 500+
- students helped across LearnWithRig tutoring
- More than 75%
- improved by at least one grade within one term when they attended consistently
These figures are across LearnWithRig tutoring as a whole, not Chemistry alone. More than 75% of students improved by at least one grade within one term when they attended consistently.
Past results describe previous students under the stated conditions. They are not a guarantee or prediction of any individual student's outcome.
Progress Evidence
Measure More Than One Overall Percentage
A meaningful progress record should show where marks moved and whether the corrected skill transfers to a fresh question. The following framework can be used by a student, parent or teacher.
| Measure | What it reveals | Useful follow-up |
|---|---|---|
| Topic score | Which syllabus areas are insecure | Targeted revision and fresh topical questions |
| Paper-component score | Whether multiple choice, theory or practical skills are weakest | Paper-specific strategy and timed work |
| Error category | Knowledge, calculation, application, wording, practical or timing loss | A repair task matching the cause |
| Retest result | Whether the student can transfer the correction | Repeat later through spaced mixed practice |
| Timing and completion | Whether knowledge is accessible under examination conditions | Timed sections and decision routines |
A Transparent Chemistry Case Study Should Contain
1. Starting evidence
Route, paper, date and a documented baseline rather than a remembered estimate.
2. Intervention
What topics, paper skills and study changes were actually used.
3. Later evidence
A comparable mock, paper or final grade with its date and context.
4. Permission and limits
Consent to publish, appropriate anonymity and no promise that another student will obtain the same result.
Founder Context
Rig's Record Remains Clearly Labelled as Math
Rig is a Mechatronics Engineering graduate from Universiti Teknologi Malaysia with 8 years teaching IGCSE and SPM Math and Add Math. He also runs the LearnWithRig Math teaching channel.
His role on this site is founder, service lead and tutor-matching lead. Chemistry lessons are taught by the Chemistry teaching team. His Math record is not a substitute for Chemistry teacher experience or Chemistry student results.
Inspect the learning evidence now
Use the trial to judge fit, not to obtain a guarantee
The paid one-hour trial lets the student work with the assigned teacher on a selected Chemistry task. It can reveal useful next steps and teaching fit, but it cannot promise a final grade.
Questions parents ask about Chemistry proof
Are Chemistry student grades currently published on this page?
No Chemistry grade case studies are currently displayed here. We will publish Chemistry-specific outcomes only when they come from this service, the facts can be checked, and the student or parent has given permission.
What proof is available now?
The currently published Chemistry-specific proof is the named teaching experience — K. S. Tan (15+ years teaching IGCSE Chemistry), Ms Yash (10+ years teaching IGCSE Chemistry) and Ms Kartini (15+ years teaching IGCSE Chemistry) — together with genuine student and parent testimonials shared with permission. The site also provides original diagnostics, questions and paper-specific teaching resources that parents can inspect before enquiring.
Is Rig's Math teaching record a Chemistry result?
No. Rig has 8 years teaching IGCSE and SPM Math and Add Math. That background belongs to the founder and service system; it is not presented as Chemistry teaching experience or a Chemistry student outcome.
How should Chemistry progress be measured?
Use a baseline and repeated evidence: topic scores, paper-component scores, calculation accuracy, command-word errors, practical skills, timing and whether corrected errors remain fixed in a fresh question. A total percentage without error analysis is incomplete.
Does the trial lesson guarantee a target grade?
No. One lesson cannot guarantee a grade or assess the entire syllabus. It can show how the student approaches a selected task, whether the teaching fit is suitable and what next step appears most useful from the evidence available.
Will testimonials be edited?
Any future testimonial should be published with permission and retain the customer's meaning. Chemistry proof must remain labelled as Chemistry; Math feedback must remain labelled as Math.
Start with evidence the student already has
Send the student's year, route, examination series, recent paper or grade and weak areas. Resources are mapped to Cambridge IGCSE Chemistry 0620 (2026–2028), and the first teaching session is a paid one-hour trial.