The headline is not misleading (as has been suggested).
The article makes direct quotes from the speeches at the conference:
//But teachers passed a motion which called on members to "campaign to ensure a comprehensive age-appropriate content including promotion of LGBT+ matters for all schools from nursery throughout all phases of state education".
Annette Pryce, a member of the NUT executive committee and teacher in Buckinghamshire, added that the “right wing, religious lobby” had prevented ministers from proposing a more “inclusive” agenda for sex education classes to include teaching about LGBT+ issues.//
Note the word "promotion". Also note that the speaker must believe that there is at least some content that IS appropriate to nursery school, otherwise she wouldn't have mention nursery education in the first place.
Also note the slur against parents with conservative religious views who may have moral concerns about LGBT+ issues being "promoted" at school. Are these concerns illegitimate?