Posted on Tuesday 16th Feb 2016
Teachers told researchers the tests, which were brought into some schools in September, distracted them from getting to know their pupils.
Many said the tests themselves were unreliable, duplicated work and did not marry with existing assessment systems.
Ministers say a fair baseline is needed to ensure pupils reach their potential.
The tests, which are being brought in to all schools from this September, measure basic reading ability, numeracy and writing, as well as children's social and emotional development.
This is done in one-to-one assessments with teachers, who use checklists that include a series of questions such as whether a pupil can maintain concentration when listening to others or can subtract using single-digit numbers.
11/07/19These are the best state secondary schools in Kent in 2019
The Real Schools Guide 2019 has listed the top 10 best secondary schools in the county
03/07/19How the abandoned Chaucer Technology School in Canterbury will be transformed and reopened
The building in Spring Lane has been deserted since 2015 and looks slightly unnerving inside - but now it has a future with Barton Court Academy Trust
21/06/19Teachers want climate crisis training, poll shows
Survey says teachers feel ill-equipped to educate pupils, as school strikes continue
19/06/19Every nursery in Kent rated outstanding by Ofsted
The ranking can make or break whether a parent sends their child to a school or not
07/06/19School pupils will be less disruptive if teachers greet them individually at classroom door, report suggests
No evidence exists to show impact of zero-tolerance approaches on bad behaviour, study finds