A large proportion of Liverpool's children have now begun to return to the classroom after the school return started at the beginning of the week.
Many senior schools staggered the return of pupils to allow for testing, with different year groups attending on different days.
For senior school students, the tests are taking place three times in the first few weeks back to attempt to limit the spread of infection.
Prior to the return, the council's director for education had appealed to parents to be patient as staff grappled with the operational challenges of testing and infection control measures.
The return appears to have mostly gone smoothly, with many schools thanking staff, parents and children for the effort they have all made in the return.
To see coronavirus levels in your area, enter your postcode below.
In a statement on Twitter, Whitefield Primary School in north Liverpool said the first week had been "joyful" and attendance was very high.
The school said: "Whitefield family you’ve made us so very happy. Thank you for a joyful first whole school week of 2021.
"Attendance 97.4% & a playground full of excited, joyful voices. Looking after each other & remembering our routines & learning. A very special start."
The effect of the return of children on infection rates will not be known for a number of weeks.
Director for public health Matt Ashton said any changes in the infection rate would be closely monitored. The return of students in September saw a very sharp spike among school age pupils.
However, the testing program in place then was not as extensive as it is now.
Local and national leaders have been clear that schools face colossal challenges following extended periods of remote learning over the last year.
As well as the potential lost learning time, many teachers and school leaders have expressed deep concern over the mental health impacts on some children after a year of isolation from their friends and teachers.
