Teachers at Cottingham High School, near Hull, had been taking industrial action since January, with walkouts called by the National Education Union (NEU).

Cottingham High School said it was “pleased” to confirm strike action had ended after “successful negotiations” with the union.

The NEU said that a new policy written by the school meant teachers were “protected from unreasonable levels of monitoring and evaluation”.

Concerns had been raised about redundancies in connection with the closure of the school’s sixth form.

However, the school said it had “consistently maintained” since October that “no more than two colleagues would be at risk of redundancy”. Strike action “did not alter this position”.

In a letter sent to parents earlier, head teacher Jay Kerby said the end of the strike meant “we can confidently move forward in a positive and productive manner, working together with mutual respect for the benefit of our learners”.

The letter set out details of a recovery plan that had been put in place by the school, including increased homework support and workshops with parents.

Steve Scott, the NEU branch secretary, said: “We are pleased that the trust and leadership at the school finally got round the table to write the policy which members had been asking for.

“We are also glad that they issued a statement on the number of redundancies, which is significantly lower than it was when this began.

“The implementation of a teaching and learning policy and adherence to the trust quality assurance policy ensures that members are protected from the school becoming a panopticon and being subject to unreasonable levels of monitoring and evaluation.”

In a statement the school said it was “fully committed to always doing our best to avoid redundancies”.

An “instructional framework” would be “implemented as agreed through negotiations” to support “the school’s vision for consistency and continuous educational improvement”.

The industrial action, led by the trade union Verdi, began unexpectedly on Sunday at Hamburg Airport, before expanding to a nationwide strike.

Passengers at Frankfurt, Munich, Berlin and other major hubs have been urged not to travel to airports, with operations severely disrupted. Frankfurt, Germany’s busiest airport, said passengers would be unable to board flights and transfer would “almost certainly” be affected.

Verdi, which represents public sector and transport workers, is in an ongoing dispute over wages and working conditions.

German media reports thousands of flights could be cancelled across the day, disrupting travel for more than 500,000 passengers.

Lufthansa, whose main hub is in Frankfurt, confirmed “delays and extensive cancellations” across all its airlines, while Munich Airport warned of a “greatly reduced flight schedule.”

Katja Bromm, spokeswoman for Hamburg Airport, where all 143 departures scheduled on Monday have already been cancelled, said Verdi was “dishonourable” to call a strike without notice at the start of the holiday season.

She said that Sunday’s walkouts were “excessive and unfair to tens of thousands of travellers who have nothing to do with the disputes”.

A spokesman for Verdi accepted that the strike would affect many, but told German media that causing disruption was necessary to extracting a better offer from employers.

Many of Frankfurt Airport’s 1,770 scheduled flights have already been cancelled, while the majority of Munich’s 820 flights are expected to be cancelled.

Hundreds more cancellations are anticipated across Stuttgart, Dusseldorf, Cologne and Berlin.

Many passengers had already checked in their luggage and were having problems getting it returned, according to public broadcaster NDR. It also reports that the strike has brought air traffic at Hanover Airport to a standstill.

Beyond airports, Verdi has also called for strikes in waste collection across several German cities, including Berlin, Essen and Kiel, where bins have gone unemptied since last week.

The union is demanding an 8% pay increase for airport workers, or at least €350 more per month, along with higher bonuses and extra time off. Employers have so far rejected these demands as unaffordable.

Further strikes were expected to go ahead this week in facilities operated by the federal government and local authorities, news agency DPA reported, citing a Verdi spokesperson.

The next round of talks is set to take place on Friday in Potsdam.