These questions have been written to support the core Ideas in context paper for the 2012 exam.

I used this with a low ability KS3 class to review their understanding of a fair test. We did all of these practicals in class during the term.

For revision of the OCR 21st century B1,2 and 3. I used these questions to try to encourage my year 10 class to practice longer answers and improve oracy and literacy. Initially they did the extended questions as homelearning. I then cut up the questions and answers sheet into strips and the students sat in groups of 2 or 3. One asked the question and the other two listened to the answer and gave feedback, checking that the student had used all the key words/ideas.

I've made these into cards with the question one side and the answer the other. The students work in 2 or 3 and lay the cards question side up. They then choose a card and try to answer it. The other student checks their answer. If they are correct they win the card. If not they have to put it back.

I have used this idea with KS3 and KS4. I photocopy the worksheet onto A3 and get students to work in 3's to say whether the picture shows and element, compound or mixture and then to identify, using the key, what the diagrams represent. As an extension students name the compounds. They can then make up their own diagrams of compounds and/or evaluate the models.

OCR 21st century B4,5,6 revision I produced this to try to get the students to improve their literacy and consider what makes a good (or poor) answer and they had to say what was wrong with the answer and wte an improved answer using better vocabulary.