Sharing with ratios - bar modelling

A (fast paced) FULL LESSON on sharing and comparing with ratios using with bar modelling and fractions.

Assumed prior knowledge:

• Converting between metric measures.
• Fractions of amounts.

We are learning about: Sharing with ratios.
We are learning to: Use ratios to compare and share amounts.

Differentiated objectives:

• Developing learners will be able to share an amount into a given ratio.
• Secure learners will be able to use a ratio to compare given amounts and totals.
• Excelling learners will be able to solve unfamiliar problems using their knowledge of using ratios to compare and share amounts.

Starter: Express ratios as 1:n. Match up equivalent ratios (standard shade in the grid activity).
Main:

• 2 examples: (Ex1) finding fractions and ratio in simplest form, (Ex2) Bar modelling to share ratio.
• Standard questions on sharing amounts with bar model provided.
• Two more examples: comparing amounts using the bar model.
• Worded questions increasing in difficulty (with solutions).

Plenary: Combining a:b and b:c to a:b:c.

Extra:

• Booklet with all questions provided as worksheet to stick in books.

Any feedback is appreciated!