# Standard Form

I’m about to start SF with year 10 and thought i’d start with a little ‘which is bigger?’ starter (below) and then look at this VERY old video. I really like how students can look at the difference x10 has. I have various worksheets that I have made over the years but powers of ten can produce some interesting discussions on population sizes, distances between places/planets.

Standard Form worksheet

# Probability

I am going to start the probability unit with my year 9 middle set class this week and have decided to start with listing outcomes. I have the lesson planned and then i started thinking about all the approaches we teach when teaching probability; using a probability tree, sample space diagrams, listing outcomes, venn diagrams, two way tables. I started to wonder how many of my class know why some are useful in some situations for example for 2 events where you want to know all the outcomes or if its just to know P(flipping 4 tails in a row)

I thought a good discussion point could be this question I have created. It also recaps a previous topic on types of number and a previous discussion on what happens when odd/even numbers are added.

prob

Students could list the outcomes, discussions could be had on how many there would be first. Students could use a probability tree and discuss why other types of diagrams aren’t helpful.

UPDATE!

Multiple ways to look at a problem