I really feel for you. My DGS seems to go to a school where teachers have so many different jobs that the children are taught by different teachers depending on the day.
Can you volunteer to hear readers? You wont get to listen to your GC, but it will benefit the childrenand give you an idea of whether the lack of provision is a school-wide or just a teacher issue.
Re split classes: Blame the government for part of the problem. With an intake of 50, the ideal class would be 2 x 25 in each year, but there is insufficient funding, so what we get is 1 x 30 FS, 1 x 20 FS + 10 Y1, 1 x 30 Y1, 1x 10 Y1 + 20 Y2 and 1 x 30 Y2.
Few teachers would choose to have a split class, but that's how it is. The way to avoid this in many areas would be to amalgamate small schools and bus children in and out. I wouldn't like that either.
Having said that, it's not as hard as it sounds. You look at the children's abilities aand the targets for the year group. Layered targets have Must, Should and Could for each year. For Progression and Challenge, the targets should be differentiated according to ability. For each year group there are 3 broad ability ranges.
Must – All children in the class (with the exception of children with special educational needs) should achieve this target. This target is generally taken from the year group below (the Should target for the previous year).
Should – This is the age appropriate target and the majority of the class should achieve this.
Could – Children working above age related expectations. This target is generally taken from the teaching programme for the following year (the Should target for the year above).
Good teachers will be using some form of this. Have a look here for an example.
http://www.cumbriagridforlearning.org.uk/index.php?category_id=259